Fig. 1. Diagram of Stark splitting of I413/2 and I415/2 of Er3+ in aluminosilicate glass.

Fig. 2. Evolution of fluorescence lifetime of energy level I413/2 with temperature in Er3+:aluminosilicate glass.

Fig. 3. Absorption cross sections in Er3+:aluminosilicate glass at different temperatures.

Fig. 4. Emission cross sections in Er3+:aluminosilicate glass at different temperatures.

Fig. 5. Evolution of normalized population of Stark sublevels in manifolds I413/2 and I415/2 with temperature.

Fig. 6. Schematic diagram of all-fiber experiment setup.

Fig. 7. Measured output power versus different temperatures.

Fig. 8. Temperature dependence of slope efficiency and laser threshold.

Fig. 9. Evolution of output power and temperature with heating time.